Abstract: The invention relates to a tool steel intended for cold working operations and having very high impact strength and good resistance to wear, said steel being made powder-metallurgically by consolidation of metal powder to a dense body. The steel has the following chemical composition expessed in weight-% 1-2.5% C, 0.1-2% Si, max 0.3% N, 0.1-2% Mn, 6.5-11% Cr, max 4% Mo, max 1% W and 3-7% V, wherein up to half the amount of vanadium can be replaced by 1.5 times as much niobium, and wherein the ratio V/C shall amount to between 2.5 and 3.7, balance essentially only iron and impurities and accessory elements in normal amounts.

Abstract: A method for manufacturing a low-alloy steel product having a very high hardenability in relation to its alloying content is disclosed. The method includes the steps of melting the steel; adding thereto a micro-alloying ingredient selected from group consisting of aluminum, titanium, and aluminum and titanium together; superheating the melt to a temperature of at least 1625.degree. C., holding the melt at the temperature level for at least two minutes; teeming and casting the melt to form ingots and hot-working the ingots to form a low alloy steel product of the following composition:______________________________________ Element Wt % ______________________________________ C 0.3-0.55 Mn 0.3-1.5 Si trace-1.0 Cr .75-1.8 Ni trace-2.0 Mo 0.05-0.4 V 0.05-0.15 P 0.03 Max S trace-0.05 Al 0.04-0.1 or Ti 0.015-0.08 or Al + Ti 0.04-0.

Abstract: A method of powder metallurgically manufacturing an article with near net shape is disclosed, the method comprisingfilling the mould cavity (3) of an open ceramic open mould (1), the inside walls of the cavity being precision copying cast surfaces (2), with fine particulate metal powder (5),placing the mould with its content of metal powder in an outer mould (6), and covering the ceramic open mould containing the metal powder with a bed of finely distributed particulate pressure medium (7),heating the bed of pressure medium and ceramic mould and particulate metal powder therein and subjecting the particulate pressure medium to pressure provided by at least one surface acting in an axial direction against the opening (4) of the ceramic mould, so that pressure is transferred by the particulate pressure medium to the metal powder in the mould to consolidate the metal powder to a completely dense body (21) with surfaces (22) which have been shaped by the precision cast surfaces of the mould cavity.

Abstract: A method of powder metallurgically manufacturing an object is disclosed, whereinplacing a first powder (4) selected from the group consisting of a metal powder, a mixture of metal powders, a metal alloy powder, a metal alloy mixture, a mixture of metal powder or metal alloy powder and fibres, particulate ceramic materials, and or other particulate material, and mixtures thereof, in an open mould (1),embedding the mould filled with first powder in a powdered pressure medium (8) made of a material which has a melting point less than the melting point of said first powder or less than the melting point of a component in said first powder which has the lowest melting point, said pressure medium essentially not evaporating at the consolidation temperature of said first powder,melting and pressure medium,raising the temperature of the first powder to a temperature between the liquidus and solidus temperatures of the metal or alloy from which the first powder is manufactured, or, if the first powder is a mixture of

Abstract: A method for manufacturing a low-alloy steel product having a very high hardenability in relation to its alloying content is disclosed. The method includes the steps of melting the steel; adding thereto a micro-alloying ingredient selected from the group consisting of aluminum, titanium, and aluminum and titanium together; superheating the melt to a temperature of at least 1625.degree. C., holding the melt at that temperature level for at least two minutes; teeming and costing the melt to form ingots and hot-working the ingots to form a low alloy steel product.